$ git clone -n https://git.cclinux.org/stage/rpms/grub2.git /mnt/compose/mock/dist-circle8-build-113973-76240/root/chroot_tmpdir/scmroot/grub2
Cloning into '/mnt/compose/mock/dist-circle8-build-113973-76240/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin bcaa858459e889d46b9224d0f55e55b00906dbd2:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/grub2
 * [new ref]         bcaa858459e889d46b9224d0f55e55b00906dbd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcaa858 import grub2-2.02-156.el8